GameSettings: Add trait for sw-renderer-for-readbacks

src/frontend-common/game_list.h

@@ -133,7 +133,7 @@ private:
   enum : u32
   {
     GAME_LIST_CACHE_SIGNATURE = 0x45434C47,
-    GAME_LIST_CACHE_VERSION = 29
+    GAME_LIST_CACHE_VERSION = 30
   };
 
   using CacheMap = std::unordered_map<std::string, GameListEntry>;

src/frontend-common/game_settings.cpp

@@ -21,6 +21,7 @@ namespace GameSettings {
 std::array<std::pair<const char*, const char*>, static_cast<u32>(Trait::Count)> s_trait_names = {{
   {"ForceInterpreter", TRANSLATABLE("GameSettingsTrait", "Force Interpreter")},
   {"ForceSoftwareRenderer", TRANSLATABLE("GameSettingsTrait", "Force Software Renderer")},
+  {"ForceSoftwareRendererForReadbacks", TRANSLATABLE("GameSettingsTrait", "Force Software Renderer For Readbacks")},
   {"ForceInterlacing", TRANSLATABLE("GameSettingsTrait", "Force Interlacing")},
   {"DisableTrueColor", TRANSLATABLE("GameSettingsTrait", "Disable True Color")},
   {"DisableUpscaling", TRANSLATABLE("GameSettingsTrait", "Disable Upscaling")},
@@ -1345,6 +1346,12 @@ void Entry::ApplySettings(bool display_osd_messages) const
     g_settings.gpu_pgxp_depth_buffer = false;
   }
 
+  if (HasTrait(Trait::ForceSoftwareRenderer))
+  {
+    Log_WarningPrint("Using software renderer for readbacks.");
+    g_settings.gpu_renderer = GPURenderer::Software;
+  }
+
   if (HasTrait(Trait::ForceRecompilerMemoryExceptions))
   {
     Log_WarningPrint("Memory exceptions for recompiler forced by game settings.");

src/frontend-common/game_settings.h

@@ -13,6 +13,7 @@ enum class Trait : u32
 {
   ForceInterpreter,
   ForceSoftwareRenderer,
+  ForceSoftwareRendererForReadbacks,
   ForceInterlacing,
   DisableTrueColor,
   DisableUpscaling,